Troubles again

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Originally Posted by zulu Delta 534

I am in no way an expert in such matters but sometimes the back pressure created by the exhaust system can be crucial to an engines performance, (well it made about two gears difference to a V8 diesel Merc.) so depending on where you have holed the exhaust system there is a possibility that your problem could lie in these realms. Perhaps if you simply plate the hole (coke can) and see if it makes a difference. Has the pipe been crimped further along the system.
Regards
Glen

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There is a slight dent in the exhaust further up the pipe but it has had that for years apparently so i am not concerned for that. The hole is well more of a snapped exhaust! :o i just had a close look and the weld where the pipe is conected to the back of the exhaust is split all the way around so i am fairly sure that could be the problem!?

Shall i just cut if off completly at the crack with a hack saw? as it shold still be slightly quiet with the muffler in place!? ;)


Cheers!

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Originally Posted by Grover-98

I'v heard that holes in exhaust can cause "turbulence" would someone be able to explain to me what this means and im guessing that could be what it is as i have checked everything else and it will idle now for a fair while and will rev fine but flutters a little. I am suspecting now it could be due to the hole in the exhaust which i did whilst i was driving over the rocks.

Cheers!

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It's a 2 stroke motor??? .... They need the exhaust to maintain back pressure // as do all 4 stroke motors

Plug the hole up via cutting and wrapping a tin can around the pipe and secure it with fencing wire

:)

I think you're barking up the wrong tree, go for the carby.

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Originally Posted by V8Ian

I think you're barking up the wrong tree, go for the carby.

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I drained the carby first ;)

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Originally Posted by Grover-98

I drained the carby first ;)

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But if its not idling, it might be a problem with the idle jet.

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Originally Posted by B92 8NW

But if its not idling, it might be a problem with the idle jet.

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most likely full of the very fine gung that resides in the bottom of the bowl; until inverted :D
Once the crud is in the jet(s) draining the bowl will not help, sorry.

I'm putting money on the carby also.

idle is the least affected by the exhaust and 4 strokes, 2 strokes, they all run with broken, cracked, holed and missing exhausts. A 2stroke you may eventually seize though, but thats not relevant.

Does this thing have a fuel filter on it? The other thing that may be worth checking is if the float is jamming somehow.

Yes it has a new filter! I am also now convinced it is the carby so i will need to strip it down and clean it out ;)

I agree almost certainly carby, specifically some of the gunk stirred up has blocked the idling jet (or a passage leading to it). There is also a possibility that it is flooding due to damage to the float or needle valve - this will also stop idling.

John

Well i had a great day everything worked in my favor i took the carby out and blew compressed air into the jets and the idle solenoid. And put it all back in then with much anticipation turned the key and...:D kicked over like a dream runs smoother then it did when i first got it!

Thanks for all of your advice, i think i will keep it on its wheels from now on to prevent this from happening again.:angel:

James.